Miobdelus baoxingensis He and Zhou, 2018

He, Liang & Zhou, Hong-Zhang, 2018, Taxonomy of the genus Miobdelus Sharp, 1889 (Coleoptera: Staphylinidae: Staphylinini) and five new species from China, Zootaxa 4377 (3), pp. 301-353 : 318-321

5. Miobdelus baoxingensis He and Zhou , sp. nov.

( Figs. 5-1 , 5-2 )

Type locality: CHINA, Sichuan Province, Baoxing County, Muping.

Type material. Holotype male, CHINA: Sichuan Province, Baoxing County, Muping, 1755 m, mixed broadleaved forest, pitfall traps, 2–5.VIII.2003, coll. Xiaodong Yu & Jie Wu ( IZ-CAS). Paratypes: CHINA: Sichuan Province: 2 females, Baoxing County, Muping, 1740 m, mixed broad-leaved forest, pitfall traps, 2–5.VIII.2003, coll. Xiaodong Yu & Jie Wu (IZ-CAS); 2 males, Erlang Shan, 3015 m, mixed broadleaf-conifer forest, pitfall traps, 6–7.VII.2001, coll. Xiaodong Yu & Hongzhang Zhou (IZ-CAS).

Measurements. Body length: 16.5–17.8 mm. CL: 0.92; EL: 2.99; ELS: 1.35; EW: 3.25; HL: 2.59; HW: 2.83; PO: 1.18; PL: 3.20; PW: 2.70.

Description. Medium sized species. Body relatively robust, black to brunneopiceous; head and pronotum with slightly brassy sheen; elytra paler, tending to be dark reddish-brown; maxillary and labial palpi dark brunneous; antennae black to dark brunneous, with apical segments vaguely paler; legs dark reddish-brown, with tibia and tarsus covered with dense brownish pubescence; pubescence of dorsal side of head, pronotum, elytra and abdominal tergites almost uniformly brownish black.Head of rounded quadrangular shape, with slightly curved lateral sides and obtusely rounded posterior angles, slightly wider than long (ratio 1.09); eyes moderately large and slightly protruding, appreciably shorter than tempora (ratio 0.78) in dorsal view; punctation and pubescence on dorsal surface of head dense, punctation robust, gradually becoming sparser toward clypeus, with shiny interspaces; interspaces without microsculpture; head disc with about five large pit-like punctures on each side of epicranial line. Y-shaped epicranial line vaguely present on head disc, difficult to be seen. Antennae moderately long, segment 3 longer than segment 2 (ratio 1.18), segments 4 to 8 distinctly longer than wide, segments 9 and 10 about as long as wide, last segment slightly narrower than segment 10. Pronotum longer than wide (ratio 1.19), with almost parallel lateral sides (anterior half slightly wider) and widely rounded posterior angles; narrow marginal groove disappearing downwards at about posterior third of pronotal length; impunctate midline clearly present on posterior half, gradually becoming vague toward anterior portion; punctation and pubescence on disc finer and denser than that on dorsal surface of head, interspace without microsculpture. Scutellum totally black, finely punctate and setose on entire surface. Elytra relatively short, elytral length shorter than pronotum along midline, with a ratio of 0.42 along suture and a ratio of 0.93 along sides, slightly dilated posteriad; elytral punctation fine and dense, granulose, with patches of dark brownish tomentose near humeral angles and at about middle of lateral sides. Wings markedly reduced. Abdomen without pale apical seam of palisade setae. Abdominal tergite 2 sparsely punctate and pubescent on entire surface; all visible abdominal tergites finely and densely punctate and pubescent; visible tergites 1 to 3 each with a pair of dark brownish tomentose patches surrounded by some small patches of dark yellowish tomentose pubescence; visible tergite 4 with a large patch of goldenyellowish tomentose patches in middle; visible tergite 5 with a tomentose patch composed of dark brown and dark reddish brown pubescence.

Male. Abdominal sternite 8 with wide and shallow, obtusely medioapical emargination. Sternite 9 relatively long; apical margin with wide and shallow emargination; tapered basal portion relatively wide (Fig. 5-2 G). Tergite 10 wide, with apical portion obtusely triangular, sparsely setose (Fig. 5-2 D). Aedeagus shaped as in Figs. 5-1 B, C, 5-2 A–C, with apical portion of median lobe markedly wide and elongate; apical portion of paramere shaped as in Figs. 5-1 D, 5-2, E, with sensory peg setae arranged along lateral sides, relatively numerous.

Female. Second gonocoxite and tergite 10 shaped as in Figs. 5-1 E, 5-2 F, H.

Distribution. Miobdelus baoxingensis He and Zhou , sp. nov. is at present known from Baoxing County and Erlang Shan in central Sichuan Province.

Notes. Miobdelus baoxingensis He and Zhou , sp. nov. can be distinguished from other congeners by the uniquely shaped aedeagus, particularly by the markedly wide and elongate apical portion of median lobe and relatively numerous sensory peg setae on paramere.

Etymology. The species epithet is from the Chinese name (Pinyin) of the type locality, Baoxing, in western Sichuan province.

Figures

FIGURE 5-1. Miobdelus baoxingensis He and Zhou, sp. nov.: A. habitus of species (2.0 mm); B. aedeagus, lateral view; (0.2 mm); C. aedeagus, ventral view (0.2 mm); D. underside of apical portion of paramere (0.2 mm); E. second gonocoxite of female genital segment (0.2 mm). Scale in parentheses.

FIGURE 5-2. Miobdelus baoxingensis He and Zhou, sp. nov.: A and C. aedeagus, lateral view; B aedeagus, ventral view; D. male tergite 10; E. underside of apical portion of paramere; F. female tergite 10; G. male sternite 9; H. second gonocoxite of female genital segment (scale bars = 0.20 mm).